Abrading wheel



Oct. 23,- l1945. G. Aw.l RocHwALD 2,387,295

BRADING WHEEL l Filed March 15, 1944 4 sheen-sheet 2 Gttorneg inventorOct. 23, 1945. G W, RVOCHWALD 2,387,296A

ABRADING WHEEL Filed March l5, 1944 4 Sheets-Sheet 3 VG. w. RQcHwALD2,387,296 ABRA'DING WHEEL Oct. 23, 1945.

FiledMarch 15. 1944v '4 sheetsfSeet-z 7llllllllllllllll/ Patented Oct.23, 1945 ABBA-DING George W. Rochwald, KearnyN' J'.

Application. March 125, 19445, Serial No. 526,54?r

i Cl., 5L-19.0.

12 Claims.

The invention relates in' particulartoA abrading, bulng' or polishingwheels off the type Whichcomprises an elastic' or, enpansible rim orannulus mounted; on a supporting bodyl in which. there is meansforexpandingl and! contractingy the rim to secure upon. and release from.the periphery ci said rim respectively-an endless band forabradingx orother purposes.

@ne obeotV off theL invention is` to provide an abradfingwheel of thischaracter whichl shall embodyI novel andl improved mea-ns for mountingthe Yelastic orexpansible rimon the bo dyand for expanding ari-d1contracting saidr-im such that the rim shalli beA anchored5 and expandedand contracted on said body uniformlythroughout the circumference off'the rim and the outerl peripheral surface or the rimshallL be'substantiallyx trulycircular at all'l times and especiallywhen therimis-eX-panded;

Another object is to provide a device or thecharacter described the'constructiony and combi-- nation ofl the parts or which shall loe-noveland improved so thati all parts shall'` be capable of resisting theeffects ofi centrifugal` force and the whole devicesha-llbe simple,stronganddurable;

Other obj e-ctsare toprovide an abrading wheel which shall embodynove-l1 andimproved features oii construction suchthat the parts can beeasily and] quicklyV assembled and disassembled; to provide-.such adevice inv which the means for eXt pand-ing and; contracting theexpansbleI rim can bei easily. and quicklyV manipulatedL so\ that bandsfor` abrading or polishing and the like can beV rapidly appliedl to andremoved from the rim,

whereby.- int'erchangingofdi-iferen-t bands on the .az nin.dificaizion-Lof the invention..

Eig-ure; 4 is; aesectonal; view. on. the line if- 44. of- Eig-11823;

Eiellrei 5;-is.a. view similar to Figure l: showing anothermodificationl of the inventionl Figurer, is aside elevation. of thewheelshown in'ligure 5 wlthf portions: broken away and.4 shown insectiom.

Eigure 75 is,- a=. front elevational Aview of another` on the line 8 8of Figure '7, and

Figure 9iis-a side elevational view off the wheel. Specificallydescribing the embodiment of ther invention illustrated-dnl FiguresandZL the Wheel includes a bodyl which.I comprises af tubular hub i1t`o\ beI appliedl to'4 the7 shaft off a motor` ory other. suitabledriving mechanism. The hubw has a.v cire cumferentialf` exterior.Ariborshoulder 2T interme-` diate its ends and? two; sideplates 31 are`fitted:v over the hub toliorm a chamber' between them?. A spacing sleevei is. interposed between. eachk side platev andi the circumiierentiallrib.- 25 andv` a. nut Y 51 is.- th-readed on. each. end` oi' the nub to1clamp: the adjacent. side plata 31. iirmlyon the: hubf rhe side plates 3arecircula-itand are encircledf attlieir peripheriesby an: expansibleriml or.v annulus. 61 which'. preferably: constitutes: af ring:` ofrubber. A plurality of thrust members 'l1 are radially. slidably.mounted on. the body.- oil` the wheel and: each has one endf connectedtoi the iii and its other.' end connected' to. means fiorA` expandingand; contracting therimi Morel para ticularly,. each thrust member is.ina the formi of" alsheetmet'al plate and has one end. 8 interlock-Yingly embedded in, the rubber-ning1 6. otherend of the thrust. memberhas. hinge knuckles. or sleeves 9. which; cooperate with the'complemental hingexknuckleszor sleeves. lon: a link H. hinge, pintle l'2extends.: thfrcughV the hinge sleeves Siand; lil and hast itsendsslidably:mount?-v ed in slots; If inthe respective side, plateslalsdpreierably each thrust member has: a: guide lug; lie at, each ofiits opposite side edges slidablyl mounted:A in; a slot |55, in; theecorresponding slide plate 3.

Each link II has tsr end: opposite the hingesleeves. l 0pivotally'connectedI at' l5 to an actuator' H5 which. isf in thez formof. a metal disc and' is journaled for` rotation on the hub. I. inaplane peignendiculartoY the axis/of4 the hub. Normally. the; ringr E."is contracted as shown in Figure. 11 andthe; links Ilv areV inclinedrtoradii of the-body, but? upon rot-ation'. off the actuator disc I6 inthedirection of the arrow'in Figure 1., the links Il! willibeactuated so asto bring them into approximately: radial planes of the body andi the rimandf therebyf exert.. outwardt pressure on the. thrust members;A la,This turn will'. expand the'rim` 6 Forrotating: the actuator disc I6, Ihave shown'. ani operating member` lil; which'. is-V journaled forFrotation.. ma studl |:8f which. is. secured in one oiv the side plates3, and one end of the operating member extends through an opening I9 inthe other side plate. The actuator disc I6 has an opening through whichthe operating member extends and said opening has one approximatelyradial wall 22 with which cooperates a cam 23 carried by the operatingmember so that as the operating member is rotated in the direction ofthe arrow on Figure l the cam 23 will engage the surface 22 and rotatethe actuator disc. The cam may have a. ilat surface 24 to cooperate withthe straight side wall 22 of the opening 20 for holding the operatingmember against rotation so as to hold the actuator disc at the limit ofits movement in the direction to expand the rim 6. Upon rotation of theoperating member in the other di-y rection, the resiliency of theexpansible rim will force the thrust members inwardly so as to permitcontraction of the rim, although, if desired, the cam 23 and the wallsof the opening 28 may be so related as to cause positive actuation ofthe actuator disc by the cam upon rotation of the latter in bothdirections. It is desirable that a stop pin 25 be provided for limitingrotation of the actuator plate.

The operating member may be rotated in any suitable manner but as shownhas a polygonal socket 26 to receive a pin wrench.

With this construction it will be observed that the rim can be easilyand quickly contracted and expanded to permit application and removal ofendless treating bands 21, such as bands having emery powder or sand ontheir outer surfaces. As is known in the art, such bands generally willhave an internal diameter approximately equal to the external diameterof the ring 6 when the latter is contracted so that when the rim isexpanded it will tightly grip the band and hold it firmly againstmovement on the rim 6.

It will also be observed that the structure permits the use of a largenumber of closely circumferentially spaced thrust members and theaccurate simultaneous actuation of all thereof so that the outerperipheral surface of the rim and consequently the surface of thetreating band shall be substantially truly circular at all timesespecially when the rim is expanded. Also, the structure will firmlyresist the eiects of centrifugal force, particularly to preventexpansion of the rim under the iniluence of centrifugal force.

Also the wheel can be'easily and quickly assembled and disassembled forinspection or repair.

In the modiiicaticn of the invention shown in Figures 3 and 4, the bodyof the wheel includes two complemental cup shaped sections 28 and 29which are separably secured together by screws 30 with the edges oftheir rims 3| in abutting relation to form a chamber between thesections. One section has an integral hub 32 while the other section hasan opening33 tted over the hub. The meeting surfaces of the rims 3| ofthe sections have complemental notches 34 whichform radial openings ineach of which is slidablyl mounted a, thrust member 35 which has a head36 at one end embedded in the expansible rim 31. l

The other end of each thrust member has pivotally connected to each ofopposite sides thereof as at 38, a link 39 the other end of which ispivotallyconnected at 48 to a circular actuator disc 4| that isjournaled for rotation on the hub' 32.

The operation of this form of the invention is substantially the same asthe operation of the wheel shown in Figures 1 and 2, rotation of theactuator disc 4| swinging thelinks '39 so as to radially slide thethrust members 35 tocause ex'' pansion and contraction of the rim 31.'I'he actuator disc may have a hole 42 like the hole 20 with the wallsof which cooperate a cam 43 like the cam 23, and the cam is rotatablymounted on a stud 44 on the body plate 28 with one end extending throughan opening 45 in the other body plate 29 for the reception of a wrenchor the like. In Figure 3 the rim is shown as expanded and upon rotationof the cam 43 in the direction of the arrow in Figure 3, the actuatordisc will be rotated to cause the thrust members 34 to slide radiallyinwardly and permit contraction of the expansible rim.

Figures 5 and 6 show another modification of the invention in which thethrust .members 46, links 41 and rim 56 are substantially the same asthe corresponding parts of the construction shown in Figures 3 and 4.The actuator disc 48 itself has a hub 49 which is journaled for rotationon the hub 50 which vis formed integrally with one section 5| on thebody 0f the wheel. This section is cup-shaped and is closed by a plate52 which is removably attached to the section 5| by screws 53. The hub49 of the actuator disc projects through an opening 54 in the plate 52and has a polygonal portion 55 by which the disc may be rotated, forexample through the application of a wrench. The links 41 are connectedto the actuator disc in the same manner as the links 39 are connected tothe disc 4I and the expansible rim 56 is expanded and contracted ashereinbefore described by rotation of the actuator disc in oppositedirections respectively. For holding the actuator disc at the limit ofits movements, the disc may have a slot 51 therethrough and a pair ofrecesses 58 inV one side of the disc leading into said slot. A pin 58 issecured to the body section l5| and extends through the slot 51, and adetent washer 59 is slidably mounted on said pin and normally influenced4by springs 66 to seat in one or the other of the recesses 58. Therecesses correspond to the two limits of movement of the actuator disc,and pressure of the spring on the washer and the seating of the latterin either recess 58 will releas-ably hold the actuator disc at one orthe other of its limits of movement.

Figures 7, 8 and 9 show another form of the invention where the wheelincludes a cup-shaped body section 6D which has a hub 6| and is closedby a plate 62 that is removably attached to the section 66 by screws 63.A plurality of thrustv members 64 are radially slidable in thecircumferential rim 65 of the body section 60, each thrust membercomprising a cylindrical rod which is slidable in an opening 66 in thebody and has a screw threaded end 61 which passes through a beveledpinion -68 in screw threaded relation thereto. The pinion 68 isjournaled on the body as by a hub 68 which is rotatable in an opening 10in an internal ilange 1| which projects from the body section 60.

The actuator member comprises a beveled gear 12 which is journaled torotate on the hub 6|. With this construction, upon rotation of the gear12 in opposite directions, the pinions 68 will be simultaneously rotatedand through their threaded connections with the thrust members 64 willmove the latter radially inwardly and outwardlly respectively so as tocontract or expand the expansible rim 13 For rotating ,the gear I haveshown it as formed with an arcuate slot 14 along one wall of which is anarcuate gear-toothed rack 1-5 with which meshes a pinion I6 which iscarried by an operatlng member 'l1 which in turn is journaled on a stud18 that is secured in the body section 6U. The operating member has apolygonal socket I9 for the reception of a pin wrench 80 for rotatingthe operating member.

With this construction it will be observed that the screw threadedrelation of the members to the pinions and the meshing of the latterwith the gear, will positively hold the actuating gear at either limitof its movement until the operating member is actuated.

While I have shown and described several embodiments of my invention, itwill be understood that this is primarily for the purpose ofillustrating the principles of the invention and that many modificationsand changes can Abe made in the details of construction within thespirit and scope of the invention.

What I claim is:

1. A wheel of the character described, comprising a body, a plurality ofradially movable thrust members mounted on said body, an expansi-ble rimto which one end of each of said thrust members is connected, and meansfor simultaneously actuating all of said thrust members radially inopposite directions to expand and to contract said expansible rimrespectively including an actuator rotatably mounted on said bodycoaxially with said rim, and a link pivotally connected to each thrustmember and to said actuator so that said links will be actuatedlongitudinally outwardly and inwardly upon rotation of said actuator in`opposite directions respectively.

2. The wheel set forth in claim 1 with the addition of means forreleasably holding said actuator at the limit of its movement in thedirection to actuate said links outwardly.

3. The wheel set forth in claim 1 wherein said expansible rim is formedof an elastic composition, each thrust member comprises a plateextending transversely of and having one end interlockingly embedded insaid rim and the other end formed with a hinge sleeve which is connectedto one of said links.

4. The wheel set forth in claim 1 wherein said body has a hub, and saidactuator comprises a disc journaled to rotate on said hub.

5. The wheel set forth in claim 1 wherein said body comprises separablyconnected complemental sections that form a chamber between them havingend walls and a circumferential wall, said actuator is rotatably mountedwithin said chamber and said thrust members are mounted in saidcircumferential wall and extend therethrough.

6. The wheel set forth in claim l wherein said body, comprises separablyconnected complemental sections that form a chamber between them havingend walls, said actuator is rotatably mounted in said chamber and saidthrust members are slidably mounted in said end walls.

7. A wheel of the character described, comprising a body, a plurality ofradially movable thrust members mounted on said body, an expansible rimto which one end of each of said thrust members posite directions toexpand and contract said expansible rim respectively including arotatable actuator and operative connections between said actuator andsaid thrust members, said actuator comprising a bevel gear rotatablymounted on said body, said thrust members including screwthreaded rodsand each said operative connection comprising a bevel pinion rotatablymounted on said body in mesh with said gear and in screw threadedengagement with one of said thrust members.

8. A wheel of the character described comprising a body, an expansiblerim, a plurality of radially movable thrust members mounted on said bodyand connected to said rim, and means for simultaneously actuating all ofsaid thrust members radially in opposite directions to expand and tocontract said expansible rim respectively including an actuatorrotatably mounted on said body coaxially with said rim, and an elementconnecting each of said thrust members of said actuator and movablerelatively to both thereof so that said thrust members will be movedlongitudinally inwardly and outwardly upon relative rotation of saidactuator and said body in opposite directions respectively.

9. A wheel of the character described comprising a body,` an expansiblerim, a plurality of radialiy movable thrust members mounted on said bodyand connected to said rim, and means for simultaneously actuating all ofsaid thrust members radially in opposite directions to expand and tocontract said expansible rim respectively including an actuatorrotatably mounted on said body coaxially with said rim, and a link foreach thrust member pivotally connected at its opposite ends to saidthrust member and to said actuator respectively, said links beingnormally inclined to radii of said rim with the latter Contracted andbeing actuated into approximately radial planes of said rim to expandsaid rim upon relative rotation of said actuator and said body.

10. The wheel set forth in claim 8 with the addition of means forrotating said actuator including an operating member rotatably journaledon said body and an operative connection between said operating memberand said actuator such that the latter is rotated upon rotation of saidmember.

11. The wheel set forth in claim 8 with the addition of means forrotating said actuator including an operating cam rotatably mounted onsaid body, and wherein said actuator has a surface engaged by said camsuch that the actuator is rotated upon rotation of said operatingmember.

12. The wheel set forth in claim 8 wherein said actuator has atransverse opening therethrough, and with the addition` of an operatingmember rotatably mounted on said body and extending through said openingto operatively engage the walls thereof so that upon rotation of saidoperating member said actuator will be rotated.

GEORGE ROCHWALD.

